Which value or values for the variable c from the set below will make 5.6 + 0.4c

6c true?

a. only 2.5

b. 1 and 2.5

c. 0.875, 1, and 2.5

d. all of the values in the set

a. only 2.5

By plugging in all three values, we will find that only 2.5 will create a correct solution of the choices.

5.6+0.4 (2.5) < 6 (2.5) True

6.6 < 15

5.6+0.4 (1) < 6 (1) False

6 < 6

5.6+0.4 (0.875) < 6 (0.875) false

5.95<5.25